Valve for percussive ramming tools



@gay 18 1926. I 1,584,800

R. F. PAGE l VALVE FOR PERCUSSIVE RAMMING TOOLS Filed Oct. 5, 1925 2 Sheets-Sheet 1 if M3 ATTO EY.

my 18, 192s.`

R. F. PAGE i VALVE FOR IERCUSSIVE RAMMING TOOLS Filed Oct. 5,' 1925 2 Sheets-Sheet 2 im# K A i Mw f VQ v Patented May i8, i926. y

isaasee vries.

RGBERT F. PAGE, DECEASED, LATE OF ATHENS, PENNSYLVANA; B'Y'JO-IN FELT,

ADMINISTRATGR, OF ATHENS, PENNSYLVANA, ASSGNOR TO NGERSOLL-BAND COMPANY, OF JERSEY CTY,-1\TEVJ JERSEY, A CGPUPORATIGN OF NE'W JERSEY.

VALVE FOR PERCUSSVE BJALEVIXNG TOOLS.

Application led October 5, 1925.

Van improved fluid actuated distributing valve "for machines of this type.

vThe objects ot the invention are to produce a simple, light, distributing valve of the sleeve type adapted to surround the cylinder of themachine and lying in a valve chamber formed by a Jfront and back cylinder casing. Further objects will hereinafter appear and to all of these ends the invention is illus- A trated in one ot its prelerred forms in the accomikianying drawings, in which Figure l is a sideelevation or a pneumatic rammer known as a door rammer or back till tamper having an extension handle, the handle itself being broken away indicating that the machine is proportionatelyT longer than indicated in the contines of the draw- Figure 2 is an enlarged longitudinal sectional elevation ot the handle portion of the machine partly broken away,

Figure 3 is an enlarged detail vertical sectional view of the upper portion of Figure 2 showing the throttle or supply valve in open position,

Figure l is a view similar to Figure B partly broken away taken at right angles to Figure 3 and showing the valve closed,

Figure 5 is an enlarged detail longitudinal sectional elevation of the percussive element of the machine partly broken away to which element the handle .rod is adapted to be secured, and

Figure 6 is a transverse sectional view ot' Figure 5 on the line 6-G looking in the direction ot the arrows. n

Referring to the drawings, the machine comprises a percussive element indicated 'generally by the reference character A in Figures l and 5 and a handle element indi- Icated by the reference character B in Figures l and 2 which two elements are suitably secured togetherk by any suit-able connection at the point C in Figure 1 in this instance a screw threaded connection being indicated. Material to be tamped, such as sand D, is operated upon by the butt- E or other suit- Seral No. 60,634.

able implement adapted to be connected to the piston rod F having the piston G reciprocating in the cylinder H andcontrolled by a distributing valve J.

In accordance with this improved construction the cylinder H is provided with 'iront and back cylinder casings K and L and the valve J is located in a valve chamber O formed between the opposed ends P and Q ofthe cylinder casings. The valve is in the form ot a sleeve surrounding the cylinder Trl and a spacing sleeve R between the ends ot the cylinder casings conveniently forms one wall ot the valve chamber. Suitable means are provided tor holding the cylinder casings together and in this instance flanges El and 'l are provided on the casings and an outer casing U extends over said cylinder' casings and bears against the flange S. A nut V is adapted to engage the opposite end of the outer casing and bear against the flange T of the back cylinder casing, iirmly clamping the parts together.

rllhe cylinder H is provided with a frontcylinder packing washer W held in position by the iront cylinder casing K and packing X for the piston rod F is held in the front portion ot the front cylinder portion K by means of a packing bushing Y which is held in place by the screw threaded cap Z and lock nut a. rlhe back head of the cylinder H is formed by the back head plug Z) which in this'instance is held in position by the shoulder c ot `he back cylinder casing L.

.This back cylinder casing L has a reduced hollow extension d containing a strainer 2 suitably connected to the back cylinder plug Z) and an oil plug j" is provided on this reduced extension d.

"he cylinder H is provided with a piston controlled exhaust port g communicating through the front cylinder casingl l with the exhaust port 7:, in the outer casing ll. Cylinder ports y' and 7J commiinicate with the ends ot the cylinder and passages o and u between the. cylinder and casings and preterably formed on the outsideoit' the cylinder connect these ports with the valve chamber. Another passage g connects the hollow back head plug with the valve chamber through the agency of the port fr in the back cylinder casing and the passage s between the outer casing U and the spacing sleeve R. The

back head plug is formed, as showm with the inlet pe ripplied throu id holle t the va L tri a i'nosphere tln'ougi'h 'he pa and through the interior' of the c o the exhaustport. 71, so that live pressure i id in l sition. Free-sure fluid is verrai topass through the rearward valve the passage 0 and thence i u Y to the rearward end et the cylinder' the piston forward. fatter the pistonA the valve nvivesthe valve to s 'forward popassed and lince 'e 'ed the exha t t its forward travel, the rearward ez d ol the valve will lie ibiect to at' 'c 'iand the will he tl.' that pres;

valve openi w passage y? and p t Zf i "a'ward 'ad ol the cylinder o return ther piston on its rearward stroke. alter which the. c fcle is repeated. The valve .i is light and simple in construction and a slu't travel el f JL' sullieient length.. however, to si pplv the 'full aniount ot pressure liiiid needed 'tor operatingr the taniper piston aad tamper tool.

ln the present instance, an extension handle is shown comprising' the hollow handle rod u. and the operative parts connected for controlling' the supplvv ot' pressure. fluid into the machine and lor taking' up the shock in the machine which would otherwise he transmitted to the hands and arins of the operator. In Figure l the extension handle rod is shown broken awayv and in Figure 2 the detail of the handle construction is illustrated. Upon the reduced portion if ot the handle rod suitably1 secured a handle head hlocl e' as by ineans ot a screw threaded connection 8. A throttle valve Ll forming the supply valve is normallyvv closed upon the Seat 5 in the head block .2 and spring' presser hy ineens ot the spring (i held in position hy the retaining nut 7 which also forms a suppl'v connection of pressure fluid to the niachine. The stein 8 ot' the valve is guided in the head block and this valve controls the supplv7 port 9 connnunieating' with the passage l0 in the head block leading' to thel hollow bore l2 of the extension handle u.

The lower end et the valve stein 8, as shown. rests upon a niova le valve lilocl-r` i3 normally resting' upon the stationary valve block 'lll both contained within a slot or opening' l5 in the head block e'. rlhese two valve blocks are formed with beveled or wedged shaped portions 1G with which wedges, operating' devices or halls l? cooperate adapted to force the upper lilocl: i3

awav l'roin the lower hlocl; as the balls are pressed inwardly. For this purpose a valve actuating sleeve lS is slidahlvv1 n'iounted outside tie head lilocl; 2 and is provided wit i the lieveled portions 19 which ioz'ce the hall inwardly as the i l? actuating sleeve forced roiwardl)v as indicated in Figures 2 and j; shoulder 2O on the head hloel; forms a stop cooperating;` with the should-9;' 2l onthe sleeve lor limiting' the nio-veineiii of the sleeve in a forward directie: 'i

zaled in;

ing' omr i' ,1 Y' ine hold end i secured against the internal of the handle sleeve so that when l die sleeve is nioved forward to open the supp v valve l, the spring' 2li elavcd hir-ler coinpressieA and upon relea" this' conii 'Ollie l pression, the handle sleeve is: reduced to ils' rearinorzt position to perniit the close upon its seat 5 under the ii th the spring (l.

In the operation ol the device, the suppl); 'alve el is opened hy sliding the handle sleeve 23 forrardl)v on the hollow handle rod u which carries the 'alve actuating sleeve 1S forwardly and the halls 1T are forced lietween the wedge shaped portions of the valve blocxs to inove the rearward valve hlock rearwardlbvY and open the valve l. Dressure t uid is then supplied down through the passages l() in the head hlecl; z and through the hollow handle rod u to the hack head block or plug` ol the pereussive elenient which starts the reciprocaticn of the piston Gr and tainper tool E lor tanipinr iurposes. The eciprocation of the pistou is stopped by releasing or moving; the slidelile handle sleeve 2S rearwardly to permit the supply valve l to close.

olainis:

l. In a fluid actuated percussive rannning tool, the combination of a handle elcinent, a manually controlled inlet valve carried thereby, a cylinder,y a reciplocating` piston, an exhaust port in the cylinder controlled by the piston, l'ront and hack cylinder casing's extending' over the cjy'linder. a fluid actuated distributing valve located in a valve chamber lorrned between said casings, means for holding;- said cylinder casings together over the cylinder7 ports in the cylinder, and between the c vlinder and casings coininunicating` with said ports and loi) the said valve chamber, whereby pressure fluid is supplied to both ends of the cylinder.

,ln a fluid actuated percussive ramming tool, the combination of' a handle element,

la manually controlled inlet valve carried thereby, a cylinder', a reciprocating piston,

an exhaust port in the cylinder controlled Y sages between the cylinder and casings communicating with said ports and the said Valve chamber, whereby pressure fluid is supplied to both ends of' the cylinder.

3. In a fluid actuated percussive rainrning tool, the combination of a handle element, a manually controlled inlet valve carried thereby, a cylinder, a reciprocating piston, an exhaust port in the cylinder controlled by the piston, front and back cylinder casings extending over the cylinder, a fluid actuated sleeve valve surrounding the cylinder and located in a Valve chamber formed between the opposed ends of said front ant back cylinder casings, a spacing sleeve between said cylinder casings forminga wall of the said Valve chamber, nica-ns for holding said cylinder casings together over the cylinder, ports in the cylinder, and passages between the cylinder and casings communieating with said ports and the said valve chamber, whereby pressure fluid is supplied to both ends of the cylinder.

el. ln a fluid actuated percussive rannning tool, the combination of' a handle element, a manually controlled inlet valve carried thereby, a cylinder, a reciprocating piston, an exhaust port in the cylinder controlled by the piston, front and back cylinder casings extending over the cylinder, a fluid actua-ted distributing valve located in a valve chamber formed between said casings, means for 'holding said cylinder casings together over the cylinder comprising flanges on the opposed ends of said casings, an outer casing abutting against one of said flanges, and a. nut engaging the outer casing and abutting` against the other flange, ports in the cylinder, and passages between the cyl inder and casings communicating with said o ports and the said valve chamber, whereby pressure fluid is supplied to both ends of the cylinder.

ln testimony whereof I have signed this specification, as administrator.

JOHN M. FELT,

S02@ Administrator of the Estate 07' Robert' F. Page, Deceased. 

